From 43c04ba1b8c81114d09c0f9f326987070e0ee291 Mon Sep 17 00:00:00 2001
From: Daniel Morsing <daniel.morsing@gmail.com>
Date: Wed, 27 Feb 2013 19:47:14 +0100
Subject: [PATCH] cmd/gc: don't emit type instructions for nonexisting locals

If all locals are optimized away, the type instructions would stay in the instruction stream. Call fixautoused to scrub the output.

Fixes #4915.

R=rsc
CC=golang-dev
https://golang.org/cl/7385055
---
 src/cmd/gc/pgen.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/cmd/gc/pgen.c b/src/cmd/gc/pgen.c
index 6f732b991eb..df8903bafea 100644
--- a/src/cmd/gc/pgen.c
+++ b/src/cmd/gc/pgen.c
@@ -209,8 +209,10 @@ allocauto(Prog* ptxt)
 	ll = curfn->dcl;
 	n = ll->n;
 	if (n->class == PAUTO && n->op == ONAME && !n->used) {
+		// No locals used at all
 		curfn->dcl = nil;
 		stksize = 0;
+		fixautoused(ptxt);
 		return;
 	}